[gennickO]

Whenever I let my body fall asleep and I go into trance i'm usually in there for about 15- 20 minutes. By that time I feel hardly any vibrations. Barely any to be more precise. I still haven't sucessfully projected yet, and I was wondering.. Do I have to do a full-body-circuit? To get the vibrations to "come"?

[freeprescriptionplanrrx]

I haven't actually experienced anything close to OBE or exit symptoms yet, so you may want to wait for some more experienced posters.

However, from what I've read not everyone experiences vibrations. It's possible that by waiting for vibrations to come you may be unintentionally hindering your progress. Again, take these words with a grain of salt; I'm far from experienced. Just well read.

[Dyerryjex]

Whenever I let my body fall asleep and I go into trance i'm usually in there for about 15- 20 minutes. By that time I feel hardly any vibrations. Barely any to be more precise. I still haven't sucessfully projected yet, and I was wondering.. Do I have to do a full-body-circuit? To get the vibrations to "come"?

First of all, you don't do the full body circuit to get the vibrations, you do it to raise energy. This is the act of stimulating energy flow and increase the capacity to build up and store energy.
Projection of the OBE kind requires energy, and some people are more prone to have it than others. Energy is also required to get control of your energy body once you've projected, and to make the projections last longer and be more lucid and possibly clear.
Vibrations are a sign that your awareness is shifting perspective and frequency- from the body-perception frequency to the higher (most probably, because of the way they're experienced) frequency of the energy body. The vibrations are usually experienced when a person projects consciously for the first time, and usually for a period of time. But almost all successful conscious projectors get to a point in which vibrations are no longer felt, or only occassionally, more often upon reentry.
So even though vibrations are thought of as something you strive for, this is not really correct- it is the state in which you perceive them that you want to get to, because that is, at least in the first experiences, the stage in which conscious exit is possible. If you succeed and start consciously projecting often, you will find out that after some time vibrations occur at non-optimal exit times (that is, earlier and earlier in the trance) until they either don't happen at all, or you experience them in such a way that are not recognizable as vibrations.

[Immarsecice]

However, from what I've read not everyone experiences vibrations. It's possible that by waiting for vibrations to come you may be unintentionally hindering your progress.

It's a good point. The interesting thing about entering trance is that you don't usually know you're there until you're pretty far along... You really have to let yourself go; don't try to think ahead, and most importantly, don't look back. If you're able to do this, you'll go deeper pretty much automatically; just have to make sure you don't go too deep, but that's a whole 'nother issue.